Citing Boston Properties’ high quality portfolio of assets and strong liquidity position, Fitch Ratings has assigned a ‘BBB’ rating to the new $700 million, 5.875 percent senior notes due Oct. 15, 2019.

Fitch gave a stable outlook to Boston Properties Limited Partnership, operating partnership of Boston Properties.

Boston Properties sold $700 million of senior notes earlier this week, in a move that may position the company well in terms of capital if and when the market recovers. The size of the deal was increased from an originally planned $500 million.

The ratings are also supported by solid debt service coverage ratios, manageable lease expiration schedule and long management track record. Credit concerns include a fairly concentrated operational footprint, asset concentration risk, some exposure to large tenants with weak credit and/or weak business prospects and challenging operating conditions, Fitch Ratings said.

Proceeds from the offering will be used for general corporate purposes, which may include investment opportunities and debt reduction, according to a statement.